Today's Message Index:
----------------------
1. 05:50 AM - Re: Question! (Bell, Bruce B.)
2. 09:03 AM - Wig-wag flasher questions (Jeff Point)
3. 09:19 AM - Ground block location (WHigg1170@aol.com)
4. 10:44 AM - Orcad question (richard@riley.net)
5. 11:53 AM - Re: Orcad question (Tom...)
6. 12:24 PM - Re: Orcad question (Robinson, Chad)
7. 02:55 PM - Magneto with electronic Ignition (LarryRobertHelming)
8. 07:57 PM - Large Elec Connection - AN vs Brass Bolt? (Neal Garvin)
9. 09:19 PM - Re: Orcad question (George Bass)
10. 09:39 PM - Re: Orcad question (richard@riley.net)
Message 1
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--> AeroElectric-List message posted by: "Bell, Bruce B." <rv4bell@door.net>
Hi Bob,
Thank you very much. I had the drawing all the time in my documents!
Best regards,
Bruce
----- Original Message -----
From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Subject: Re: AeroElectric-List: Question!
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
>
> At 02:57 PM 9/12/2003 -0500, you wrote:
> >--> AeroElectric-List message posted by: "Bell, Bruce B."
<rv4bell@door.net>
> >
> >Good afternoon Bob,
> >I installed two 17 amp batteries and one 40 amp alternator in my RV4. I
> >thought you had a drawing showing this set up. I can't seem to find it on
> >your web site. Is it still a good idea?
> >Regards,
> >Bruce Bell
> >Lubbock, Texas
> >RV4 # 2888
>
> sure. don't know why not. You can add an extra battery to
> any existing battery with addition of a battery contactor,
> battery, battery bus and battery master switch. This is
> illustrated in Figure Z-30 of
> http://www.aeroelectric.com/articles/Rev10/z10.pdf
>
> Bob . . .
>
>
Message 2
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| Subject: | Wig-wag flasher questions |
--> AeroElectric-List message posted by: Jeff Point <jpoint@mindspring.com>
Hi Bob,
Regarding the wig-wag flasher wiring diagram on your website, I have a
couple of questions:
1. I would like to use the single switch method on page 3 of the
diagram, but I would like to wire it such that the middle position is
"On" and the upper position is "Flash." It appears that I can do this
just by reversing the outputs of pins 1 & 4 on the switch. Is this
true, or am I missing something.
2. I am concerned about the voltage drop using the bridge rectifier
causing a reduction in brightness of the lamps. I believe the
Connection says that these diodes have a forward voltage drop of about
.6V. My own measurements show this drop to be about .8V when used in my
E-bus setup. This is using the diode I got from B & C. I picked up a
similar diode from the Shack, pn 276-1185, and it lists the forward
voltage drop as 1.7V. Is this at the full 50V? Is the drop linear with
respect to input voltage? Does it vary with current? Most importantly,
does this small voltage drop result in a noticeable loss of light at the
lamp?
Jeff Point
Message 3
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| Subject: | Ground block location |
--> AeroElectric-List message posted by: WHigg1170@aol.com
Hello I have a question on the B&C 24 terminal ground block location. I don't
have the engine or mount and I want to place the ground block on the cabin
side of the firewall but don't know were to put it so it won't be in the way and
also still use vans #2 cables that came with the wiring harness kit. Thanks
Bill
RV-6
Message 4
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--> AeroElectric-List message posted by: richard@riley.net
I'm trying to get Orcad to lay out my electrical systems, and I've found
Cadence Orcad 9.2
and
CADENCE ORCAD UNISON SUITE 2002
Which one do I want?
Message 5
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--> AeroElectric-List message posted by: "Tom..." <tsled@pacbell.net>
Hiya,
Cadence bought OrCAD about 3 years ago and added their name. I have used
OrCAD for 12 years to do schematics and what I am using today is OrCAD 9.2
but it is NOT an inexpensive package, and some of the symbols don't look as
pretty as some of the other schematic capture packages out there. But if
you are designing CPU boards it is a GREAT program.
Tom...
Intel
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of
richard@riley.net
Subject: AeroElectric-List: Orcad question
--> AeroElectric-List message posted by: richard@riley.net
I'm trying to get Orcad to lay out my electrical systems, and I've found
Cadence Orcad 9.2
and
CADENCE ORCAD UNISON SUITE 2002
Which one do I want?
Message 6
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--> AeroElectric-List message posted by: "Robinson, Chad" <crobinson@rfgonline.com>
Orcad is a schematic layout tool, used for designing circuits. It's WAY more than
you need unless you actually want to build, say, a graphical fuel flow meter
and want to lay out the schematic and PCB for that.
Consider an inexpensive (or free) traditional CAD tool and Bob's pre-made electrical
bus icons (which he has so kindly made available in .DWG format on his Web
site). If you insist on a true schematic layout tool, there are numerous free
options, such as what comes from ExpressPCB.com. But Orcad is a multi-thousand-dollar
package and laying out fuses and switches is, well, sort of beneath
it. =)
> -----Original Message-----
> From: richard@riley.net [mailto:richard@riley.net]
> Sent: Saturday, September 13, 2003 1:43 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Orcad question
>
>
> I'm trying to get Orcad to lay out my electrical systems, and I've found
>
> Cadence Orcad 9.2
> and
> CADENCE ORCAD UNISON SUITE 2002
>
> Which one do I want?
Message 7
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| Subject: | Magneto with electronic Ignition |
--> AeroElectric-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>
Members of the Aeroelectric List: I am looking at figure Z-27 ( page Z-20 )
showing the use of two (2-3) switches to control each ignition side and to
kill the push to start circuit when the right side ignition is on. I see
that to initially start the engine we turn on the left and close/flip/press
the start switch or button. ( The right ignition switch must be off for
starting) After the engine is started and running on the left side only, we
close the right side ignition for normal dual ignition operations. (With
that, it is impossible to energize the starter with the right side ignition
on.)
Now my question: I am not understanding how this two-switch setup in Z-27
allows for run up testing of each side of the ignition system. I am missing
something about how magnetos work or how they are grounded out so they do
not function. We prove the right ignition function, I deduce, by turning
off the left ignition/magneto switch. Then we turn the left switch back on
and continue with testing the right side. But, looks to me when I go to
prove the left ignition by turning off the right ignition switch that the
engine should die because both the right side AND the start switch provide
energy for the left side. ( Or is the left side now running on its own and
does not need energy from the main buss? ) I am missing something and need
a dumb boy's 101 schooling session here. ( Understanding something is one
step further than knowing something.)
Seems to me Z-28 could work for one magneto one EI with reasonable
protection using very simple 1-3 switches if the start button was under a
flip up protector or recessed in a hole of some sort.
Larry in Indiana
Message 8
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| Subject: | Large Elec Connection - AN vs Brass Bolt? |
--> AeroElectric-List message posted by: "Neal Garvin" <ngarvin@comcast.net>
Bob,
I used an AN-4 bolt, not brass, to connect two large, soldered on wire lugs
together on a solid fiberglass tab on the inside of the fuselage behind the
panel. The two lugs are on the same side of the tab, back-to-back, not
separated by the fiberglass.
The reason I didn't use brass is I wanted to really mash it down to get that
"air-tight" connection and I was concerned a brass bolt would break to
easily. Should I keep a watch for any dis-similar metal corrosion or other
problems related to using an AN bolt?
-Neal Garvin
Glasair N15F
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Robert
L. Nuckolls, III
Subject: Re: AeroElectric-List: Ground Strap Location?
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
At 06:48 AM 9/10/2003 -0700, you wrote:
>--> AeroElectric-List message posted by: Joe Dubner <jdubner@yahoo.com>
>
>B&C sells a braided bonding strap. The description of it states:
>
>". . . Engine mounts should not be part of the electrical circuitry for
>the engine; these bonding straps establish the appropriate pathway for
>starter and alternator currents to the airframe. . . ."
>
>(I have to take that with a grain of salt as my airplane is a Long-EZ,
>so routing "starter and alternator currents to the airframe" is futile.
> But they do need to route to the battery of course.)
>
>If not an engine mount bolt, where specifically should the engine ground
>strap connection be made. I'm particularly interested in the proper
>location(s) for my Lycoming O-235 as it currently uses an engine mount
>bolt.
DC power ground should come through your firewall on a
5/16" (min) or 3/8" (better) brass bolt. This bolt may or
may not be associated with a firewall ground bus as illustrated
in http://www.bandc.biz/GroundBlock.html
The bonding strap should run from some bolt on the crankcase
to the firewall penetration stud . . . others on the list
can advise you of where they found suitable bolts on or near
the rear of their Lycoming engines.
A #2 ground wire continues forward from that bolt to a panel
ground bus and from there on forward to the battery (-) terminal.
See view -B- of
http://www.aeroelectric.com/articles/Appendix_Z_Drawings/z15ak.pdf
Bob . . .
--------------------------------------------
( Knowing about a thing is different than )
( understanding it. One can know a lot )
( and still understand nothing. )
( C.F. Kettering )
--------------------------------------------
Message 9
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| Subject: | Re: Orcad question |
--> AeroElectric-List message posted by: "George Bass" <George_Bass_0@hotmail.com>
I know many folks dislike adding to the over-abundance
of money generating products (quite a few of which do
nothing for the purchaser) of MS, but one product that I
use and find very usefull for schematic, and designing of
many personal projects is VISIO from Microsoft.
This program was created by an independant company,
but, turned out to be so good, and so compatible, that MS
bought them out completely, and MS now markets VISIO
as one of their own products.
There are a great many 'templates' available from simple
sets like "office" pieces, to complex and specific design
symbols used for "crime scene investigation" and others
that are especially for electrical, or many other fields.
Hope this helps (BTW, it isn't expensive),
George
---
Message 10
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--> AeroElectric-List message posted by: richard@riley.net
At 03:24 PM 9/13/03 -0400, you wrote:
>--> AeroElectric-List message posted by: "Robinson, Chad"
><crobinson@rfgonline.com>
>
>Orcad is a schematic layout tool, used for designing circuits. It's WAY
>more than you need unless you actually want to build, say, a graphical
>fuel flow meter and want to lay out the schematic and PCB for that.
>
>Consider an inexpensive (or free) traditional CAD tool and Bob's pre-made
>electrical bus icons (which he has so kindly made available in .DWG format
>on his Web site). If you insist on a true schematic layout tool, there are
>numerous free options, such as what comes from ExpressPCB.com. But Orcad
>is a multi-thousand-dollar package and laying out fuses and switches is,
>well, sort of beneath it. =)
There are two reasons to use Orcad in this instance. First, it's not my
money. The Very Large Aerospace Company that I work for has decided (in
their infinite wisdom) that I can get free training in Orcad, and a copy of
it on my laptop. And, yes, I'm allowed to take the laptop home with me and
use it on my own projects, since that will help me get proficient at using
it. Oddly, nobody seems to have noticed that my job has *nothing* to do
with electronics. But that's beside the point.
The second reason is that the EE/Nasa tech that's helping me wire my plane
is already standardized on Orcad, and this way we can pass drawings back
and forth easily.
So - which is the newest and bestest version - 9.2, or suite 2002?
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